题文
It is reported that in our country cities __________ heavy air pollution that is 30 percent above the national standard or higher should try to meet standards by 2030.
| A．suffering |
| B．suffer |
| C．suffered |
| D．are suffering |
推荐试卷
It is reported that in our country cities __________ heavy air pollution that is 30 percent above the national standard or higher should try to meet standards by 2030.
| A．suffering |
| B．suffer |
| C．suffered |
| D．are suffering |
试题篮
()
粤公网安备 44130202000953号
